£2 AIR rROM FINERY CINDER AND CHARCOAt. 



patch and feco- Fercnce for commercial purpofes, efpecially in the hands of 

 fciinnf* UQ " men unu ^ ec ^ to ma ^ e experiments, or to read the graduations 

 of a rule. It is fo much more eafy to pitch upon a (ingle let- 

 ter than to read a graduation by flroke, as well upon the in- 

 ftrument as the fcale, that I apprehend the literal inftrument, 

 with the varioufly figured weights, will in general be attended 

 with greater certainty in the hands of all but philofophers. 

 And for this reafon the inventor is undoubtedly right in offering 

 both to the public. 

 Cjfindric bulb. The cylindrical figure of the bulb affords the means of dU 

 minifhing the fize of the affay jar, and consequently will 

 demand a lefs quantity of the fpirit to make the requifil* 

 trials. 



XL 



On the Air from Finery Cinder and Charcoal, with other Remarks 

 an the Experiments and Obfervations of Mr. Cruickjhank. In 

 a Letter from Joseph Priestley, L. L. D. F. R. S. 

 4-c. #c 



To Mr. NICHOLSON. 



Dear Sir, Northumberland (America), Ap. 16, 1802. 



Mr. CRUICKSHANK having added a fupplement to the 

 account of his experiments on the air from finery cinder and 

 charcoal, in anfwer to my objections to the new theory from 

 the properties of that kind of air, I have given more particular 

 attention to it, and with you to add the following obfervations 

 to thofe which I have already fent you on the fubject. 

 The air from When I firft procured this kind of air, I was far from ima- 

 finery cinder and gining that I had difcovered any new fpecies of air, efTentially 

 ifated^differ different from any other, fo as to be entitled to a new appella- 

 from other denfetion, but only another variety in the heavy inflammable air, 

 mil '"hTthe^ro- wmcn * s known to be exceedingly various in different pro- 

 portion of fixed cefTes, and even in the different flages of the fame procefs, all 

 airita J ,rd8b y however agreeing in this, that when all fixed air is carefully 

 warned out of them, more is found on the decompofition of 

 them when they are fired together with dephlogifticaited air 



An> 



\ 



